Device for diamond-burnishing of holes

Abstract

Various kinds of finishing and hardening treatments of holes by methods of plastic surface deformation can find application in many branches of engineering industry. In particular for burnishing holes on a milling or drilling machine tool. A device for diamond-burnishing of holes increases the functional possibilities, improves the quality of the treated hole surface and the endurance of the burnishing tool, provides the opportunity for a precise regulation in order to get the necessary hole caliber, and uses the load of all the weights for obtaining the necessary pressing force. The device structure comprises a housing with a tapered stem, central and terminal arms with crossheads and shafts, bars with weights, a foot with a cylindrical body, and an arbor with a diamond-burnishing tool.

The invention claimed is: 
     
       1. A device for diamond-burnishing of holes, comprising
 a housing; 
 a stem extending from the housing; 
 a translation mechanism mounted on the stem and in the housing; 
 wherein the translation mechanism comprises:
 a pair of central arms and two pairs of terminal arms fitted on an end of the stem, 
 crossheads linking the central and terminal arms to each other, 
 guide pins slideably receiving the crossheads, 
 a compression spring mounted between said crossheads, extension springs linking ends of said guide pins to each other, 
 bars linked to ends of said terminal arms via shafts, and 
 inertial weights mounted on said bars, 
 
 a cover mounted in a groove in the housing, and linked to the translation mechanism via one of said shafts; 
 a foot mounted on the cover; 
 a cylindrical body mounted on the foot; 
 an arbor mounted in an opening in the cylindrical body; and 
 a diamond-burnishing tool fixed to said arbor. 
 
     
     
       2. The device according to  claim 1 , wherein said guide pins are located in grooves provided in the housing. 
     
     
       3. The device according to  claim 1 , further comprising a brass plate mounted in the groove at one side thereof, between the housing and the cover. 
     
     
       4. The device according to  claim 1 , wherein the foot is fixed on the cover by screws. 
     
     
       5. The device according to  claim 1 , further comprising a pin located in a groove made in the cylindrical body for limiting stroke and position of the arbor. 
     
     
       6. The device according to  claim 1 , wherein the arbor is mounted eccentrically in the cylindrical body. 
     
     
       7. The device according to  claim 1 , wherein the diamond burnishing tool is mounted eccentrically on the arbor. 
     
     
       8. The device according to  claim 1 , wherein the groove in the housing comprises a dovetail groove in the housing. 
     
     
       9. The device according to  claim 1 , wherein the stem is tapered.